Save this script to your user's Library -> Application Support -> Quicksilver -> Actions folder, and name it EasyFind.scpt. You'll need to have "Enable access for assistive devices" enabled under Universal Access in System Preferences. To use:

If you turn on the services plugin in quicksilver, EasyFind provides a text service to the services menu. This works really well, and doesn't take adding your own script or turning on access for assistive devices. With ServiceScrubber, you can call the EasyFind service whatever you want.